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The Recorded Segment Time on a Device Is Different From Garmin Connect
It is possible for segment times to display differently on the device and the Garmin Connect™ platform. The segment times are not written to the activity file that the device uploads to Garmin Connect.
The calculations on the device are separate to that of Garmin Connect. This can cause the segment time to be different on Garmin Connect than on the Garmin® device.